The mint condition Charizard Holo card, estimated at 8,000 to 12,000, sold for 22,100 (almost $30,000), the highest price Ewbanks has achieved for a single Pokmon card
The short answer is yes, many booster boxes do appreciate in value, but the reasons behind this are more nuanced than you might think
One major problem with this set, as Mark Rosewater once explained, is that it is "parasitic." Meaning, its cards care very much about interacting only with other cards from the block, and Champions cards don't get along well with the game as a whole
Bellwether, Assistant Mayor An uncommon card being this good is well uncommon
In the current format, the big ones that I think you're going to be looking at are Primal Groudon-EX (PRC 86/160), M Rayquaza-EX (ROS 76/108), and M Tyranitar-EX (AOR 43/98), which are all things that could one-hit K-O Giratina-EX -- but they can't because of its ability